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International Journal of Antennas and Propagation
Volume 2017, Article ID 9794053, 8 pages
Research Article

Electromagnetic Shielding Characteristics of Eco-Friendly Foamed Concrete Wall

1Department of Information and Communication Engineering, Kongju National University, Cheonan 31080, Republic of Korea
2Department of Architecture Engineering, Kongju National University, Cheonan 31080, Republic of Korea

Correspondence should be addressed to Ic-Pyo Hong;

Received 8 February 2017; Revised 21 March 2017; Accepted 3 April 2017; Published 12 April 2017

Academic Editor: Luciano Tarricone

Copyright © 2017 Sung-Sil Cho et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The electromagnetic shielding characteristics according to the material composition of foamed concrete, which was manufactured to reduce environmental pollution and to economically apply it in actual building walls, were researched herein. Industrial by-products such as ladle furnace slag (LFS), gypsum, and blast furnace slag (BFS) were added to manufacture foamed concrete with enhanced functionalities such as lightweight, heat insulation, and sound insulation. The electrical characteristics such as permittivity and loss tangent according to the foam and BFS content were calculated and measured. Free space measurement was used to measure the electromagnetic shielding characteristics of the actually manufactured foamed concrete. It was confirmed that electromagnetic signals were better blocked when the foam content was low and the BFS content was high in the measured frequency bands (1–8 GHz) and that approximately 90% of the electromagnetic signals were blocked over 4 GHz.